Improvement in coal aimd ore separators



J. B. WILFORD.

COAL AND ORE SEPA'RATOR Patented Nov.16,1875.

No.170,14.-Z.

NFETERS, PHOTO-LITHDGRAFHER, WASHINGYON. O C.

Philadelphia, in the State of Pennsylvania, have invented an Improvement in Separators H. Bradford, a jig-box is represented as moved September 19,1874, there is described a bal-,

over a higher edge upon the jig-box.

. assort and separate the lpifips or pieces of JOHN 13. .WILFORD, or 'PHI'L bELPHiA, 1rENN SYLvAiv A, AssIeNoR fro N -.HEZEKIAHBRADFORD-OF SAME PLACE;

Dv ORE sEPARAIToRsQQ a Specification forming of Letters'Batent No.1ff70,l42,dated{N0vember 16, 1875; application filed.

March 13, 1875.

To auwhom it-mwy concern:

Be it known that 1, JOHN B. WILFORD, of

for Coal, Ores, &c., of which the following is a specification:

In Letters Patent No. 143,219, granted to up and down in a tank of water, and coal or ore is gradually supplied into it, and the jigging motion causes the mass to be separated according to gravity, and the heavier portions pass through the screen or perforated jig-bottom, and the lighter portions pass away over the edge of the jig-box. In Letters Patent N 0. 143,492 an opening is shown at the side of the jig for the lateral delivery of the heavier pieces, and in an application of said Bradford, dated anced delivery, the heavier portions going over a lower edge, and the lighter material passing My present invention is an improvement upon and modification of the last-named device.

I make use of a jig with a perforated bottom, reciprocated in .the water substantially similar to that in aforesaid patents; but at the delivery side of the jig-box there are separate delivery levels, the side of the box being notched at one or more places, and a hood being provided at such places, that extends down in the jig sufficiently far that only the heavy pieces can pass below its lower edge, and work up within the hood, and over the lower level at the delivery-edge, into a chute or trough that is separate from that into which the lighter materials aredelivered from the adjacent higher edge.

In the drawing, Figure 1 is a plan of the apparatus. Fig. 2 is a vertical cross-section, and Fig. 3 is a front view.

The jig-box is made with ends a, side b, delivery-side c, and perforated bottom d; and at e there are links or connecting-rods, passing to cranks on a revolving shaft, whereby the entire jig and contents receive a rapid vibratory or reciprocating motion in the Water, to

ta-1 or are material teamin to gravity.

A reference is hereby made to the said patents.

for the means for operating the jig, and the proportions of speed and extent of motion according to the size of the pieces, the principles of operation, and the manner of separating according to gravity being the same; but the delivery devices are different in the particulars herein named.

The coal or other material is supplied gradually by the inclined chute f, and the sides of the jig-box are either extended down to inclose a sufficient body of water to insure a proper upward action in consequence of the inertia of the water, or else the stationary box 9 is employed for the samepurpose, as in patents heretofore granted to said Bradford, and in his specification before named.

The delivery-side of the jig is made with the delivery-edges 2 2 higher than the deliveryedges 3 3; and at the delivery-edges 3 3 there are hoods 1, attached to and extending both above and below the edges 3, so as to form a separation of the material within thesevertical hoods from that outside of them; and as these hoods do not extend to the bottom of the jig, the operation, therefore, will be as follows: Coal and slate, or other materials of varying specific gravities, but of nearly uniform size, being supplied into the jig, and the jig vibrated, the heavier portions, such as slate, gradually pass to the bottom, and the coal is at the top, and is delivered over the'edge 2 into a suitable receptacle or chute. The smaller pieces of slate and bone-coal may pass through the perforated bottom of the jig. The pieces that are too large to pass through accumulate upon the bottom of the jig and form a layer of valves, and the surplus valves rise within the hood 1 to the delivery-edge 3, and pass over into the chutes or receptacles m, that preferably convey them to the vat below the jig, so as to be delivered with the smaller pieces pass ing through the jig-grate.

The relative heights of the delivery-edges 2 and 3 are such that the column of slate in the hood lwill be about equal in gravity to the higher column of slate and coal outside of the hood, so that the delivery of the two will be in proportion to the supply, the jig-always re-' maining full, or nearly so. The edge 2 or 3 may be made adjustable, so as to suit the varying conditions of material, and check the delivery of either the coal or the slate that may be passing away too rapidly in, proportion. I have shown the hood 1 adjustable for the same purpose, because when it is lowered the quantity of heavier material passing into the hood will be lessened, and vice versa.

If desired, the delivery-edge? may be within the jig-box, as seen in plan, Fig. 4, a pipe or trunk, m, being introduced at that point to form the delivery-chute; but I preferthe construction before. described.

I do not claim a stationary screen, through which water is forced by a pump, in combination with trunks that are stationary and placed abovesuch-screens, as these operate in a (liffere'n't manner to my device, in which the jigbox is reciprocated, and the lower edge for the heavier material to pass over and the higher edge for the lighter materials alternate.

I claim as my invention-- The reciprocating jig-box' having deliveryedges-2 and 3% different heights, and alternating along the side or sides of the jig-box, in combination with a hood contiguous to each of the lower delivery-edges 3, substantially as v and for the purposes set forth.

Signed by me this 27th day of February,

A. D. 1875. a JNO. B. WILFORD.

Witnesses:

WM. 0. STRAWBRIDGE, J. QUINN. 

